EP0560738A1 - Procédé de double-impregnation de bois utilisant des sels minéraux et de huile de goudron rectifié - Google Patents
Procédé de double-impregnation de bois utilisant des sels minéraux et de huile de goudron rectifié Download PDFInfo
- Publication number
- EP0560738A1 EP0560738A1 EP93830086A EP93830086A EP0560738A1 EP 0560738 A1 EP0560738 A1 EP 0560738A1 EP 93830086 A EP93830086 A EP 93830086A EP 93830086 A EP93830086 A EP 93830086A EP 0560738 A1 EP0560738 A1 EP 0560738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- coal tar
- mineral salts
- impregnation
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000002023 wood Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000005470 impregnation Methods 0.000 claims abstract description 27
- 150000003839 salts Chemical class 0.000 claims abstract description 26
- 239000011280 coal tar Substances 0.000 claims abstract description 25
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 20
- 239000011707 mineral Substances 0.000 claims abstract description 20
- 238000004321 preservation Methods 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 42
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 7
- 229910052785 arsenic Inorganic materials 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229920002522 Wood fibre Polymers 0.000 claims description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 6
- 238000011282 treatment Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- WHRZCXAVMTUTDD-UHFFFAOYSA-N 1h-furo[2,3-d]pyrimidin-2-one Chemical compound N1C(=O)N=C2OC=CC2=C1 WHRZCXAVMTUTDD-UHFFFAOYSA-N 0.000 description 2
- 235000006173 Larrea tridentata Nutrition 0.000 description 2
- 244000073231 Larrea tridentata Species 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 229960002126 creosote Drugs 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 241000233866 Fungi Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010875 treated wood Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/44—Tar; Mineral oil
- B27K3/46—Coal tar
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
Definitions
- This patent application for an industrial invention concerns a process for the double impregnation of wood intended to ensure its optimal preservation, effected with mineral salts and rectified coal tar oil.
- wood as a construction material for outside works, has become of considerable importance of late, not only because of its technical characteristics, as concerns resistance, elasticity, and workability, but also and above all, for environmental and aesthetic reasons.
- wood to be used in outside constructions is usually subjected to impregnation treatments which do not allow harmful agents to penetrate its fibres.
- This second procedure entails the following steps, once the timber has been placed inside the tank:
- This new process comprises the following operational phases:
- temperature and pressure values and also the duration of the oil impregnation phase vary within the minimum and maximum values indicated above, according to the type of wood being treated.
- said new salts which are defintely to be preferred compared to the old salts in that they are more suited to the current ecological climate, could prove however to be less effective as concerns their antisceptic potential; in spite of this they could in any case be used to advantage in the process according to the invention, given the fact that any limited antisceptic capacity could be more than adequately compensated by the rectified coal tar oil which would be mixed with the salts in the wood fibres.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT92AN000005A IT1265799B1 (it) | 1992-03-05 | 1992-03-05 | Procedimento di doppia impregnazione del legno atto a consentirne l'ottimale conservazione, eseguito con sali minerali ed olio di |
| ITAN920005 | 1992-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0560738A1 true EP0560738A1 (fr) | 1993-09-15 |
Family
ID=11333572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93830086A Withdrawn EP0560738A1 (fr) | 1992-03-05 | 1993-03-03 | Procédé de double-impregnation de bois utilisant des sels minéraux et de huile de goudron rectifié |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0560738A1 (fr) |
| IT (1) | IT1265799B1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996035560A1 (fr) * | 1995-05-08 | 1996-11-14 | The University Of Melbourne | Procede de traitement du bois avec des conservateurs |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1523925A (en) * | 1921-11-28 | 1925-01-20 | Walter R Wheaton | Method of preserving wood |
| GB1181246A (en) * | 1967-04-28 | 1970-02-11 | Hager Ab | Improvements in or relating to Methods of Treating Wood |
| GB1512549A (en) * | 1975-11-26 | 1978-06-01 | Hager Ab | Process for the treatment of wood |
| FR2392786A1 (fr) * | 1977-05-31 | 1978-12-29 | Forest Prod Util Lab | Procede pour l'impregnation sous pression du bois |
| GB2044311A (en) * | 1979-03-05 | 1980-10-15 | Haeger B O | Process for the treatment of wood |
-
1992
- 1992-03-05 IT IT92AN000005A patent/IT1265799B1/it active IP Right Grant
-
1993
- 1993-03-03 EP EP93830086A patent/EP0560738A1/fr not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1523925A (en) * | 1921-11-28 | 1925-01-20 | Walter R Wheaton | Method of preserving wood |
| GB1181246A (en) * | 1967-04-28 | 1970-02-11 | Hager Ab | Improvements in or relating to Methods of Treating Wood |
| GB1512549A (en) * | 1975-11-26 | 1978-06-01 | Hager Ab | Process for the treatment of wood |
| FR2392786A1 (fr) * | 1977-05-31 | 1978-12-29 | Forest Prod Util Lab | Procede pour l'impregnation sous pression du bois |
| GB2044311A (en) * | 1979-03-05 | 1980-10-15 | Haeger B O | Process for the treatment of wood |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996035560A1 (fr) * | 1995-05-08 | 1996-11-14 | The University Of Melbourne | Procede de traitement du bois avec des conservateurs |
| US6235403B1 (en) | 1995-05-08 | 2001-05-22 | The University Of Melbourne | Process of treating wood with preservative |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1265799B1 (it) | 1996-12-11 |
| ITAN920005A1 (it) | 1993-09-05 |
| ITAN920005A0 (it) | 1992-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE FR IT LI |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19940316 |